Tag Archives: TARs

HiRISE: Channeled valley east of Protonilus Mensae

Channelized valley east of Protonilus Mensae. Beautiful Mars series.

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HiRISE: Dunes

There shall be order! Beautiful Mars series.

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HiRISE: Rounded mounds in northern Arabia Terra

These rounded, mysterious mounds occur along the floor of a depression in northern Arabia Terra. The mound surface has many parallel troughs that contain light-toned transverse aeolian (e.g., formed by the wind) ridges oriented perpendicular to the trough walls. The … Continue reading

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HiRISE: Erosion & deposition in Schaeberle Crater

Schaeberle Crater is a large, heavily-infilled crater with many interesting features. This image shows a window into the crater fill deposit, showcasing eroding bedrock and aeolian landforms. This pit is located near the geometric center of our image, making it … Continue reading

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HiRISE: Down in the paleochannels

Transverse aeolian ridges — or TARs — are mysterious, wind-blown features that are intermediate in size between ripples and much larger sand dunes. Ripples form from hopping sand grains, and dunes form from sand grains being blown over longer distances. … Continue reading

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HiRISE: Bizarre TARs

These strange features in Syria Planum are still being widely debated. They have the same general form as transverse aeolian ridges (TARs) elsewhere on Mars; windblown deposits that are common in the Martian tropics. Their height and spacing are similar … Continue reading

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HiRISE: Braided TARs in Syrtis Major

Transverse aeolian ridges (TARs) are commonly found throughout the Martian tropics, including rocky regions such as Syrtis Major that are largely devoid of dust. These bright wind-blown ripples most often occur in simple sets of ridges with regular size and … Continue reading

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HiRISE: Banded TARs in Iapygia

The tropics of Mars are commonly littered with small bright ripples that were somehow shaped by the wind. Called “transverse aeolian ridges”, or TARs, the features stand up to 6 meters tall and are spaced a few tens of meters … Continue reading

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HiRISE: Feathery ridges

This HiRISE image shows a valley filled with an assortment of linear ridges. These ridges are often referred to as transverse aeolian ridges, or TAR, and they take a variety of forms. Here they sit at right angles to the … Continue reading

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